After opening The Lighthouse chest on 2 of my characters I took a break from the new Elimination mode to explore the new social space. During my exploration I found a new hidden area.
I remember hearing in the Grimoire somewhere that Osiris's last known location is somewhere on Mercury. If you look around you can find the bones of 2 dead Guardians as well as some bullet casings and dead Vex.
I was thinking the bones might be those of the fabled Osiris, Interested in hearing what do you Guardians think?
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Looks like they were experimenting on some vex and the vex came alive and killed them